1229398869 has 16 divisors (see below), whose sum is σ = 1662571520. Its totient is φ = 807945840.

The previous prime is 1229398823. The next prime is 1229398873. The reversal of 1229398869 is 9688939221.

It is not a de Polignac number, because 1229398869 - 2¹³ = 1229390677 is a prime.

It is a super-2 number, since 2×1229398869² = 3022843158196958322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229398169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160014 + ... + 167520.

It is an arithmetic number, because the mean of its divisors is an integer number (103910720).

Almost surely, 2^1229398869 is an apocalyptic number.

It is an amenable number.

1229398869 is a deficient number, since it is larger than the sum of its proper divisors (433172651).

1229398869 is an equidigital number, since it uses as much as digits as its factorization.

1229398869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8280.

The product of its digits is 3359232, while the sum is 57.

The square root of 1229398869 is about 35062.7846726412. The cubic root of 1229398869 is about 1071.2666947543.

The spelling of 1229398869 in words is "one billion, two hundred twenty-nine million, three hundred ninety-eight thousand, eight hundred sixty-nine".